add dependabot monthly updates for all code

.github/dependabot.yml

@@ -0,0 +1,54 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    groups:
+      "GitHub Actions updates":
+        patterns:
+          - "*"
+  - package-ecosystem: "docker"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+  - package-ecosystem: "docker"
+    directory: "/publisher"
+    schedule:
+      interval: "monthly"
+  - package-ecosystem: "docker"
+    directory: "/updater"
+    schedule:
+      interval: "monthly"
+  - package-ecosystem: "gomod"
+    directory: "/rss_generator"
+    schedule:
+      interval: "monthly"
+    groups:
+      "Go modules updates":
+        dependency-type: "production"
+      "Go modules updates for tests":
+        dependency-type: "development"
+  - package-ecosystem: "gomod"
+    directory: "/publisher"
+    schedule:
+      interval: "monthly"
+    groups:
+      "Go modules updates":
+        dependency-type: "production"
+      "Go modules updates for tests":
+        dependency-type: "development"
+  - package-ecosystem: "npm"
+    directory: "/hugo"
+    schedule:
+      interval: "monthly"
+    groups:
+      "NPM modules updates":
+        dependency-type: "production"
+      "NPM development modules updates":
+        dependency-type: "development"

Dockerfile

@@ -19,6 +19,9 @@ RUN cd /build && go build -o /build/bin/rss_generator -ldflags "-s -w" && ls -la
 
 FROM alpine:3.18
 
+# https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#docker
+LABEL org.opencontainers.image.source="https://github.com/radio-t/radio-t-site"
+
 RUN \
     apk add --update --no-cache tzdata curl openssl git openssh-client ca-certificates && \
     cp /usr/share/zoneinfo/EST /etc/localtime && \

publisher/Dockerfile

@@ -21,6 +21,9 @@ RUN \
 
 FROM umputun/baseimage:app-latest
 
+# https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#docker
+LABEL org.opencontainers.image.source="https://github.com/radio-t/radio-t-site"
+
 RUN \
     apk add --update openssh-client git && \
     mkdir -p /home/app/.ssh && \

updater/Dockerfile

@@ -1,5 +1,8 @@
 FROM alpine:3.8
 
+# https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#docker
+LABEL org.opencontainers.image.source="https://github.com/radio-t/radio-t-site"
+
 ENV \
     TERM=xterm-color           \
     TIME_ZONE=America/Chicago  \