Add docker, pip and npm to GitHub's Dependabot (#3401)

Co-authored-by: Bruno Alla <browniebroke@users.noreply.github.com>
Co-authored-by: Bruno Alla <alla.brunoo@gmail.com>

{{cookiecutter.project_slug}}/.github/dependabot.yml

@@ -1,7 +1,95 @@
+# Config for Dependabot updates. See Documentation here:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
 version: 2
 updates:
-  # Update Github actions in workflows
+  # Update GitHub actions in workflows
   - package-ecosystem: "github-actions"
     directory: "/"
+    # Check for updates to GitHub Actions every weekday
     schedule:
       interval: "daily"
+
+{%- if cookiecutter.use_docker == 'y' %}
+
+  # Enable version updates for Docker
+  # We need to specify each Dockerfile in a separate entry because Dependabot doesn't 
+  # support wildcards or recursively checking subdirectories. Check this issue for updates:
+  # https://github.com/dependabot/dependabot-core/issues/2178
+  - package-ecosystem: "docker"
+    # Look for a `Dockerfile` in the `compose/local/django` directory
+    directory: "compose/local/django/"
+    # Check for updates to GitHub Actions every weekday
+    schedule:
+      interval: "daily"
+
+  # Enable version updates for Docker
+  - package-ecosystem: "docker"
+    # Look for a `Dockerfile` in the `compose/local/docs` directory
+    directory: "compose/local/docs/"
+    # Check for updates to GitHub Actions every weekday
+    schedule:
+      interval: "daily"
+
+  # Enable version updates for Docker
+  - package-ecosystem: "docker"
+    # Look for a `Dockerfile` in the `compose/local/node` directory
+    directory: "compose/local/node/"
+    # Check for updates to GitHub Actions every weekday
+    schedule:
+      interval: "daily"
+  
+  # Enable version updates for Docker
+  - package-ecosystem: "docker"
+    # Look for a `Dockerfile` in the `compose/production/aws` directory
+    directory: "compose/production/aws/"
+    # Check for updates to GitHub Actions every weekday
+    schedule:
+      interval: "daily"
+
+  # Enable version updates for Docker
+  - package-ecosystem: "docker"
+    # Look for a `Dockerfile` in the `compose/production/django` directory
+    directory: "compose/production/django/"
+    # Check for updates to GitHub Actions every weekday
+    schedule:
+      interval: "daily"
+
+  # Enable version updates for Docker
+  - package-ecosystem: "docker"
+    # Look for a `Dockerfile` in the `compose/production/postgres` directory
+    directory: "compose/production/postgres/"
+    # Check for updates to GitHub Actions every weekday
+    schedule:
+      interval: "daily"
+
+  # Enable version updates for Docker
+  - package-ecosystem: "docker"
+    # Look for a `Dockerfile` in the `compose/production/traefik` directory
+    directory: "compose/production/traefik/"
+    # Check for updates to GitHub Actions every weekday
+    schedule:
+      interval: "daily"
+
+{%- endif %}
+
+  # Enable version updates for Python/Pip - Production
+  - package-ecosystem: "pip"
+    # Look for a `requirements.txt` in the `root` directory
+    # also 'setup.cfg', 'runtime.txt' and 'requirements/*.txt'
+    directory: "/"
+    # Check for updates to GitHub Actions every weekday
+    schedule:
+      interval: "daily"
+
+{%- if cookiecutter.js_task_runner != "None" %}
+
+  # Enable version updates for javascript/npm
+  - package-ecosystem: "npm"
+    # Look for a `packages.json' in the `root` directory
+    directory: "/"
+    # Check for updates to GitHub Actions every weekday
+    schedule:
+      interval: "daily"
+
+{%- endif %}