Docs/installation guide (#727)

* docs(docs): 📝 Update v1.0.0 installation docs

* fix frontend build

Co-authored-by: Hayden <hay-kot@pm.me>

docs/docs/documentation/getting-started/installation/postgres.md

@@ -0,0 +1,54 @@
+# Installing with PostgreSQL
+
+Postgres support was introduced in v0.5.0. At this point it should be used with caution and frequent backups.
+
+**For Environmental Variable Configuration See:**
+
+- [Frontend Configuration](/mealie/documentation/getting-started/installation/frontend-config/)
+- [Backend Configuration](/mealie/documentation/getting-started/installation/backend-config/)
+
+```yaml
+---
+version: "3.7"
+services:
+  mealie-frontend:
+    image: hkotel/mealie:frontend-nightly
+    container_name: mealie-frontend
+    environment:
+    # Set Frontend ENV Variables Here
+      - ALLOW_SIGNUP=true
+      - API_URL=http://mealie-api:9000
+    restart: always
+    ports:
+      - "9925:3000"
+  mealie-api:
+    image: hkotel/mealie:api-nightly
+    container_name: mealie-api
+    volumes:
+      - ./data/:/app/data
+    environment:
+    # Set Backend ENV Variables Here
+      - PUID=1000
+      - PGID=1000
+      - TZ=America/Anchorage
+      - MAX_WORKERS=1
+      - WEB_CONCURRENCY=1
+      - BASE_URL=https://beta.mealie.io
+
+    # Database Settings
+      - DB_ENGINE=postgres
+      - POSTGRES_USER=mealie
+      - POSTGRES_PASSWORD=mealie
+      - POSTGRES_SERVER=postgres
+      - POSTGRES_PORT=5432
+      - POSTGRES_DB=mealie
+    restart: always
+  postgres:
+    container_name: postgres
+    image: postgres
+    restart: always
+    environment:
+      POSTGRES_PASSWORD: mealie
+      POSTGRES_USER: mealie
+```
+