Chore: [AEA-5751] - Update dependabot schedule and add git secrets build command (#551)

## Summary

- 🤖 Operational or Infrastructure Change

Author: wildjames

.devcontainer/devcontainer.json

@@ -52,11 +52,19 @@
         "editor.formatOnType": false, // required
         "editor.formatOnSave": true, // optional
         "editor.formatOnSaveMode": "file",
-        "cSpell.words": ["fhir", "Formik", "pino", "serialisation"]
+        "cSpell.words": [
+          "fhir",
+          "Formik",
+          "pino",
+          "serialisation"
+        ]
       }
     }
   },
-  "postCreateCommand": "rm -f ~/.docker/config.json; git config --global --add safe.directory /workspaces/eps-prescription-status-update; make install; direnv allow ."
+  "remoteEnv": {
+    "LOCAL_WORKSPACE_FOLDER": "${localWorkspaceFolder}"
+  },
+  "postCreateCommand": "rm -f ~/.docker/config.json; git config --global --add safe.directory /workspaces/eps-prescription-status-update; make install; direnv allow . && docker build -f https://raw.githubusercontent.com/NHSDigital/eps-workflow-quality-checks/refs/tags/v4.0.4/dockerfiles/nhsd-git-secrets.dockerfile -t git-secrets . && poetry run pre-commit install --install-hooks -f"
   // "features": {},
   // Use 'forwardPorts' to make a list of ports inside the container available locally.
   // "forwardPorts": [],

.github/dependabot.yml

@@ -9,17 +9,22 @@ updates:
     # default location of `.github/workflows`
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "weekly"
+      day: "friday"
+      time: "18:00" # UTC
     commit-message:
       prefix: "Upgrade: [dependabot] - "
+    open-pull-requests-limit: 20
 
   ###################################
   # NPM workspace  ##################
   ###################################
   - package-ecosystem: "npm"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "weekly"
+      day: "friday"
+      time: "18:00" # UTC
     versioning-strategy: increase
     commit-message:
       prefix: "Upgrade: [dependabot] - "
@@ -31,7 +36,10 @@ updates:
   - package-ecosystem: "pip"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "weekly"
+      day: "friday"
+      time: "18:00" # UTC
     versioning-strategy: increase
     commit-message:
       prefix: "Upgrade: [dependabot] - "
+    open-pull-requests-limit: 20