Add readme for top level folder, clean up dead code

README.md

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+# IMMICH
+
+Self-hosted Photo backup solution directly from your mobile phone.
+
+# Development
+
+You can use docker compose for development, there are several services that compose Immich
+
+1. The server
+2. PostgreSQL
+3. Redis
+
+## Populate .env file
+
+Navigate to `server` directory and run
+
+```
+cp .env.example .env
+```
+
+Then populate the value in there.
+
+To start, run
+
+```bash
+docker-compose up ./server
+```
+
+To force rebuild node modules after installing new packages
+
+```bash
+docker-compose up --build -V ./server
+```