diff --git a/.env.development b/.env.development
new file mode 100644
index 0000000000..0629bf94ce
--- /dev/null
+++ b/.env.development
@@ -0,0 +1,7 @@
+LOCAL_DOMAIN=localhost
+ALTERNATE_DOMAINS=mastodon.internal
+
+DB_HOST=$(pwd)/data/postgres
+DB_USER=mastodon
+DB_NAME=mastodon_dev
+REDIS_URL=unix://./data/redis/redis-dev.sock
diff --git a/.env.test b/.env.test
index 761d0d9210..1cfc25119a 100644
--- a/.env.test
+++ b/.env.test
@@ -3,3 +3,8 @@ NODE_ENV=tests
 # Federation
 LOCAL_DOMAIN=cb6e6126.ngrok.io
 LOCAL_HTTPS=true
+
+DB_HOST=$(pwd)/data/postgres
+DB_USER=mastodon
+DB_NAME=mastodon_dev
+REDIS_URL=unix://./data/redis/redis-dev.sock
diff --git a/.gitignore b/.gitignore
index 7d76b82751..d045131724 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,9 @@
 # or operating system, you probably want to add a global ignore instead:
 #   git config --global core.excludesfile '~/.gitignore_global'
 
+# Ignore local dotenv overrides
+.env.*.local
+
 # Ignore bundler config and downloaded libraries.
 /.bundle
 /vendor/bundle
@@ -12,6 +15,9 @@
 /db/*.sqlite3
 /db/*.sqlite3-journal
 
+# Ignore local data directory
+/data
+
 # Ignore all logfiles and tempfiles.
 .eslintcache
 /log/*
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 049cd4e29b..b4454309e9 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,6 +1,6 @@
-#  Contributing to Mastodon Glitch Edition  #
+#  Contributing to Mastodon Glitch+Treehouse Edition  #
 
-Thank you for your interest in contributing to the `glitch-soc` project!
+Thank you for your interest in contributing to the **Treehouse Mastodon** project!
 Here are some guidelines, and ways you can help.
 
 >   (This document is a bit of a work-in-progress, so please bear with us.
@@ -8,14 +8,19 @@ Here are some guidelines, and ways you can help.
 
 ##  Planning  ##
 
-Right now a lot of the planning for this project takes place in our development Discord, or through GitHub Issues and Projects.
+Right now a lot of the planning for this project takes place in the `#fediverse`
+channel of the Treehouse Discord, or through Gitea Issues.
+
 We're working on ways to improve the planning structure and better solicit feedback, and if you feel like you can help in this respect, feel free to give us a holler.
 
 ##  Documentation  ##
 
-The documentation for this repository is available at [`glitch-soc/docs`](https://github.com/glitch-soc/docs) (online at [glitch-soc.github.io/docs/](https://glitch-soc.github.io/docs/)).
-Right now, we've mostly focused on the features that make this fork different from upstream in some manner.
-Adding screenshots, improving descriptions, and so forth are all ways to help contribute to the project even if you don't know any code.
+The upstream Glitch documentation for this repository is available at [`glitch-soc/docs`](https://github.com/glitch-soc/docs) (online at [glitch-soc.github.io/docs/](https://glitch-soc.github.io/docs/)).
+
+##  Setup  ##
+
+For a some-batteries-required guide to setting up a development environment for this repository, read Rin's excellent
+[SETUP.md](https://gitea.treehouse.systems/treehouse/mastodon/src/branch/main/SETUP.md).
 
 ##  Frontend Development  ##
 
diff --git a/README.md b/README.md
index 256f2d2def..c04e743072 100644
--- a/README.md
+++ b/README.md
@@ -1,14 +1,20 @@
-#  Mastodon Glitch Edition  #
+#  Mastodon Glitch+Treehouse Edition  #
 
->   Now with automated deploys!
+> Now with bunny ears!
 
-[![Build Status](https://img.shields.io/circleci/project/github/glitch-soc/mastodon.svg)][circleci]
-[![Code Climate](https://img.shields.io/codeclimate/maintainability/glitch-soc/mastodon.svg)][code_climate]
+So here's the deal: we all work on this code, and anyone who uses that does so absolutely at their own risk. Can you dig it?
 
-[circleci]: https://circleci.com/gh/glitch-soc/mastodon
-[code_climate]: https://codeclimate.com/github/glitch-soc/mastodon
+Specifically, this fork-of-a-fork is intended for Treehouse use only. Unless
+otherwise communicated, we will not put effort into supporting other deployments
+or upstreaming our patches.
 
-So here's the deal: we all work on this code, and anyone who uses that does so absolutely at their own risk. can you dig it?
+## Links
 
-- You can view documentation for this project at [glitch-soc.github.io/docs/](https://glitch-soc.github.io/docs/).
-- And contributing guidelines are available [here](CONTRIBUTING.md) and [here](https://glitch-soc.github.io/docs/contributing/).
+- You can view upstream Glitch's documentation for this project at [glitch-soc.github.io/docs/](https://glitch-soc.github.io/docs/).
+- Contributing guidelines are available [here](CONTRIBUTING.md).
+
+## Known Deployments
+
+- Treehouse Social: [social.treehouse.systems](https://social.treehouse.systems)
+- VT Social: [vt.social](https://vt.social)
+- Unstable Systems: [unstable.systems](https://unstable.systems)
diff --git a/SETUP.md b/SETUP.md
new file mode 100644
index 0000000000..d09de77b24
--- /dev/null
+++ b/SETUP.md
@@ -0,0 +1,143 @@
+# Setting up a dev environment
+
+## Prerequisites
+
+Mastodon development requires the following:
+
+- Ruby 3.0
+- Ruby gems:
+  - `bundler`
+  - `irb`
+  - `foreman`
+- NodeJS v18 (LTS)
+- NPM packages:
+  - `yarn`
+- Postgres
+- Redis
+
+### macOS
+
+First, make sure you have Homebrew installed. Follow the instructions at
+[brew.sh](https://brew.sh).
+
+Run the following to install all necessary packages:
+```
+brew install ruby@3.0 foreman node yarn postgresql redis
+```
+
+Ruby 3.0 is **keg-only** by default. Follow the instructions in the **Caveat**
+to add it to your path.
+
+### Linux
+
+We will assume that you know how to locate the correct packages for your distro.
+That said, some distros package `bundler` and `irb` separately. Make sure that
+you also install these.
+
+On Arch, you will need:
+
+- `ruby`
+- `ruby-bundler`
+- `ruby-irb`
+- `ruby-foreman`
+- `redis`
+- `postgresql`
+
+### Windows
+
+Unfortunately, none of the authors use Windows. Contributions welcome!
+
+## Database
+
+In the root of this repository, go through the following script:
+```sh
+# Create a folder for local data
+mkdir -p data
+
+# Set up a local database
+pg_ctl -D data/postgres initdb -o '-U mastodon --auth-host=trust'
+
+# Use the data/postgres folder for the DB connection unix socket
+#
+# If you don't know what that means, it's just a way for Mastodon to communicate
+# with a database on the same machine efficiently.
+#
+# See: https://manpages.ubuntu.com/manpages/jammy/man7/unix.7.html
+echo 'unix_socket_directories = .' >> data/postgres/postgresql.conf
+
+# Start the database
+pg_ctl -D data/postgres start --silent
+```
+
+## Redis
+
+In the root of this repository, run the following:
+```sh
+# Create a folder for redis data
+mkdir -p data/redis
+
+# Start Redis
+redis-server ./redis-dev.conf
+
+# [Optional] Stop Redis
+kill "$(cat ./data/redis/redis-dev.pid)"
+```
+
+## Ruby
+
+```sh
+export RAILS_ENV=development
+
+# Bundle installs all Ruby gems globally by default, which might cause problems.
+bundle config set --local path 'vendor/bundle'
+
+# [Apple Silicon] If using macOS on Apple Silicon, run the following:
+# bundle config build.idn-ruby -- --with-idn-dir="$(brew --prefix libidn)"
+
+# Install dependencies using bundle (Ruby) and yarn (JS)
+bundle install
+yarn install
+
+# Setup the database using the pre-defined Rake task
+#
+# Rake is a command runner for Ruby projects. The `bundle exec` ensures that
+# we use the version of Rake that this project requires.
+bundle exec rake db:setup
+
+# [Optional] If that fails, run the following and try again:
+# bundle exec rake db:reset
+```
+
+## Running Mastodon
+
+1. Run `export RAILS_ENV=development NODE_ENV=development`.
+  a. Put these in your shell's .rc, or a script you can source if you want to skip this step in the future.
+2. Run `bundle exec rake assets:precompile`.
+  a. If this explodes, complaining about `Hash`, you'll need to `export NODE_OPTIONS=--openssl-legacy-provider`.
+  b. After doing this, you will need to run `bundle exec rake assets:clobber` and then re-run
+  `bundle exec rake assets:precompile`.
+3. Run `foreman start`
+
+# Updates/Troubleshooting
+
+## RubyVM/DebugInspector Issues
+
+Still unable to fix. Circumvent by removing `better_errors` and `binding_of_caller` from Gemfile.
+Happy to troubleshoot with someone better with Ruby than us >_<'/.
+
+## Webpack Issues
+If Webpack compalins about being unable to find some assets or locales:
+Try:
+
+1. `rm -rf node_modules`
+2. `yarn install`
+
+If this doesn't help, try:
+
+1. `yarn add webpack`
+2. `git restore package.json yarn.lock`
+3. `yarn install`
+
+Then re-run `foreman`. No. We have no idea why this worked.
+
+If the above instructions don't work, please contact @Rin here, or @tammy@social.treehouse.systems.
diff --git a/lib/mastodon/redis_config.rb b/lib/mastodon/redis_config.rb
index 98dc4788d1..11ae63c7a8 100644
--- a/lib/mastodon/redis_config.rb
+++ b/lib/mastodon/redis_config.rb
@@ -1,17 +1,36 @@
 # frozen_string_literal: true
 
+require 'pathname'
+
 def setup_redis_env_url(prefix = nil, defaults = true)
-  prefix = prefix.to_s.upcase + '_' unless prefix.nil?
+  prefix = "#{prefix.to_s.upcase}_" unless prefix.nil?
   prefix = '' if prefix.nil?
+  redis_url_key = "#{prefix}REDIS_URL"
 
-  return if ENV[prefix + 'REDIS_URL'].present?
+  if ENV[redis_url_key].present?
+    conn = +ENV["#{prefix}REDIS_URL"].sub(/redis:\/\//i, '')
 
-  password = ENV.fetch(prefix + 'REDIS_PASSWORD') { '' if defaults }
-  host     = ENV.fetch(prefix + 'REDIS_HOST') { 'localhost' if defaults }
-  port     = ENV.fetch(prefix + 'REDIS_PORT') { 6379 if defaults }
-  db       = ENV.fetch(prefix + 'REDIS_DB') { 0 if defaults }
+    # Strip any prefixing `unix://`
+    unix = !conn.sub!(/^unix:\/\//i, '').nil?
+    # Strip any prefixing `./`
+    unix |= conn.sub!(/^(\.\/)+/, '')
+    unix |= conn.start_with?('/')
 
-  ENV[prefix + 'REDIS_URL'] = begin
+    if unix
+      pn = Pathname.new(conn)
+      pn = Pathname.getwd / pn if pn.relative?
+      ENV[redis_url_key] = "unix://#{pn}"
+    end
+
+    return
+  end
+
+  password = ENV.fetch("#{prefix}REDIS_PASSWORD") { '' if defaults }
+  host     = ENV.fetch("#{prefix}REDIS_HOST") { 'localhost' if defaults }
+  port     = ENV.fetch("#{prefix}REDIS_PORT") { 6379 if defaults }
+  db       = ENV.fetch("#{prefix}REDIS_DB") { 0 if defaults }
+
+  ENV["#{prefix}REDIS_URL"] = begin
     if [password, host, port, db].all?(&:nil?)
       ENV['REDIS_URL']
     else
@@ -27,7 +46,7 @@ setup_redis_env_url(:cache, false)
 setup_redis_env_url(:sidekiq, false)
 
 namespace         = ENV.fetch('REDIS_NAMESPACE', nil)
-cache_namespace   = namespace ? namespace + '_cache' : 'cache'
+cache_namespace   = namespace ? "#{namespace}_cache" : 'cache'
 sidekiq_namespace = namespace
 
 REDIS_CACHE_PARAMS = {
diff --git a/redis-dev.conf b/redis-dev.conf
new file mode 100644
index 0000000000..ed197151d0
--- /dev/null
+++ b/redis-dev.conf
@@ -0,0 +1,12 @@
+# This redis configuration is for development only
+
+daemonize yes
+
+dir ./data/redis
+pidfile ./redis-dev.pid
+
+unixsocket ./redis-dev.sock
+unixsocketperm 700
+
+# Disable TCP
+port 0
diff --git a/streaming/index.js b/streaming/index.js
index cecb53ed5b..b09e7e6b6d 100644
--- a/streaming/index.js
+++ b/streaming/index.js
@@ -18,7 +18,7 @@ const env = process.env.NODE_ENV || 'development';
 const alwaysRequireAuth = process.env.LIMITED_FEDERATION_MODE === 'true' || process.env.WHITELIST_MODE === 'true' || process.env.AUTHORIZED_FETCH === 'true';
 
 dotenv.config({
-  path: env === 'production' ? '.env.production' : '.env',
+  path: env === 'production' || env === 'development' ? `.env.${env}` : '.env',
 });
 
 log.level = process.env.LOG_LEVEL || 'verbose';