New compose stack on dev/compose with signing and reload enabled (#2292)

Compose stack on dev/compose with signing and reload enabled

dev/compose/README.md

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+# Galaxy Simplified Compose Stack
+
+Profiles:
+
+- `aap` - Run galaxy_ng for integration with Ansible Automation Platform and Resource Server
+- `community` - Run galaxy_ng for galaxy.ansible.com development
+- `cloud` - Run galaxy_ng for console.redhat.com development
+
+## Requirements
+
+- `docker compose` version `>=2`
+
+## Usage
+
+Pick a profile as needed and on the root of `galaxy_ng` repository.
+
+> Examples assumes `aap` as the profile, change as needed.
+
+Build images
+```bash
+docker compose -f dev/compose/aap.yaml build
+```
+
+Run the stack
+```bash
+docker compose -f dev/compose/aap.yaml up
+# optionally pass `-d` to release the terminal
+```
+
+Exec commands on the `manager` service
+
+Bash
+```console
+$ docker compose -f dev/compose/aap.yaml exec manager /bin/bash
+bash-4.4#
+```
+Django Admin
+```console
+$  docker compose -f dev/compose/aap.yaml exec manager pulpcore-manager
+Type 'pulpcore-manager help <subcommand>' for help on a specific subcommand.
+
+Available subcommands:
+
+[app]
+    add-signing-service
+    analyze-publication
+...
+```
+
+Settings
+```console
+$ docker compose -f dev/compose/aap.yaml exec manager dynaconf get DATABASES | python -m json.tool
+{
+  "default": {
+    "ENGINE": "django.db.backends.postgresql",
+    "HOST": "postgres",
+    "NAME": "galaxy_ng",
+    "PASSWORD": "galaxy_ng",
+    "PORT": 5432,
+    "USER": "galaxy_ng"
+  }
+}
+```
+```console
+$ docker compose -f dev/compose/aap.yaml exec manager dynaconf list
+CONTENT_ORIGIN<str> 'https://localhost'
+CACHE_ENABLED<bool> False
+CACHE_SETTINGS<dict> {'EXPIRES_TTL': 600}
+ALLOWED_CONTENT_CHECKSUMS<list> ['sha224', 'sha256', 'sha384', 'sha512']
+...
+```
+
+Stopping
+```console
+$ docker compose -f dev/compose/aap.yaml down
+# add -v to stop and remove volumes
+```
+
+
+## API Access
+
+Galaxy API is available on:
+
+[http://localhost:5001/api/galaxy/v3/swagger-ui/](http://localhost:5001/api/galaxy/v3/swagger-ui/)
+
+AAP UI and API will be available only if started separately on:
+
+[https://localhost](https://localhost)
+
+Ansible Hub UI can be started separately as a standalone `npm` run.
+
+
+```console
+
+```
+
+## Reload
+
+Changing `.py` and `.yaml` files on any of the `DEV_SOURCE_PATH` directories will trigger reload of `api`, `worker`, and `content` services.
+
+
+## Tips and Tricks.
+
+**TBD**
+
+
+### Debugging
+
+### Connecting to Database
+
+### Dumping and restoring the database
+
+### Populating testing data