refactor: build only one frappe/erpnext image (#1032)

* ci: skip frappe builds

* refactor: build only one frappe/erpnext image

* fix: lint nginx entrypoint script

* docs: update and organize docs

* docs: fix lint errors

* fix(custom): pass base64 encoded apps json

* ci: update dependabot

* docs: update contributing

* docs: remove info about multi image setup

* fix: initiate empty common_site_config.json

default config has host keys set to localhost
causes connection errors

* docs: add details for pwd volumes

* fix: symlink assets instead of copy

* fix: nginx private files

* ci: skip docker compose v2 install for ubuntu-latest

* fix: organize layers

* feat: allow remove git remote for custom image

* docs: allow remove git remote for custom image

* fix: remove duplicate --apps_path

overrides/compose.custom-domain-ssl.yaml

@@ -0,0 +1,5 @@
+services:
+  custom-domain:
+    labels:
+      - traefik.http.routers.${ROUTER}.entrypoints=http,https
+      - traefik.http.routers.${ROUTER}.tls.certresolver=le