Add self hosting docs (#34)

* Add self host docs

* Add more documentation

.env.selfhost.example

@@ -1,21 +1,22 @@
-# Redis container name
+# Redis container name - required
 REDIS_URL="redis://redis:6379"
 
-# Postgres
+# Postgres - required for docker-compose, not needed for just docker
 POSTGRES_USER="postgres"
 POSTGRES_PASSWORD="postgres"
 POSTGRES_DB="unsend"
+# Postgres - required
 DATABASE_URL="postgresql://postgres:postgres@postgres:5432/unsend"
 
-# NextAuth
+# NextAuth - required
 NEXTAUTH_URL="http://localhost:3000"
 NEXTAUTH_SECRET=
 
-# Github login
+# Github login - required
 GITHUB_ID="<your-github-client-id>"
 GITHUB_SECRET="<your-github-client-secret>"
 
-# AWS details
+# AWS details - required
 AWS_DEFAULT_REGION="us-east-1"
 AWS_SECRET_KEY="<your-aws-secret-key>"
 AWS_ACCESS_KEY="<your-aws-access-key>"
@@ -23,8 +24,7 @@ AWS_ACCESS_KEY="<your-aws-access-key>"
 
  
 DOCKER_OUTPUT=1
-NEXT_PUBLIC_IS_CLOUD=false
 API_RATE_LIMIT=1
 
-# used to send important error notification
+# used to send important error notification - optional
 DISCORD_WEBHOOK_URL=""