Docker changes

Added:
Healthchecks
Changed Postgres to Alpine + pinned
Pinned Traefik Version
Made Env Vars easier to see + change/reference for those using their own env file.

docker-compose.dev.yml

@@ -2,7 +2,7 @@ version: '3'
 
 services:
   postgres:
-    image: postgres
+    image: postgres:14.2-alpine
     container_name: postgres
     ports:
       - 5432:5432
@@ -10,6 +10,13 @@ services:
     volumes:
       - ./scripts/database/initialize.sql:/docker-entrypoint-initdb.d/initialize.sql
       - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres" ]
+      interval: 30s
+      timeout: 30s
+      start_period: 15s
+      retries: 3
+    restart: always
 
   traefik:
     image: traefik