Chore: [AEA-5751] - Update dependabot schedule and add git secrets build command (#432)

## Summary

update dependabot schedule


- 🤖 Operational or Infrastructure Change

Co-authored-by: anthony-nhs <[email protected]>

Author: jonathanwelch1-nhs

.devcontainer/devcontainer.json

@@ -8,13 +8,6 @@
     "context": "..",
     "args": {}
   },
-  "features": {
-    "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {
-      "version": "latest",
-      "moby": "true",
-      "installDockerBuildx": "true"
-    }
-  },
   "mounts": [
     "source=${env:HOME}${env:USERPROFILE}/.ssh,target=/home/vscode/.ssh,type=bind",
     "source=${env:HOME}${env:USERPROFILE}/.gnupg,target=/home/vscode/.gnupg,type=bind"
@@ -59,6 +52,14 @@
       }
     }
   },
-  "remoteEnv": { "LOCAL_WORKSPACE_FOLDER": "${localWorkspaceFolder}" },
-  "postCreateCommand": "rm -f ~/.docker/config.json; git config --global --add safe.directory /workspaces/nhs-fhir-middy-error-handler; make install; direnv allow ."
+   "remoteEnv": { "LOCAL_WORKSPACE_FOLDER": "${localWorkspaceFolder}" },
+   "postAttachCommand": "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": {
+     "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {
+       "version": "latest",
+       "moby": "true",
+       "installDockerBuildx": "true"
+     },
+     "ghcr.io/devcontainers/features/github-cli:1": {}
+   }
 }

.github/dependabot.yml

@@ -9,7 +9,10 @@ updates:
     # default location of `.github/workflows`
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "weekly"
+      day: "friday"
+      time: "18:00" # UTC
+    open-pull-requests-limit: 20
     commit-message:
       prefix: "Upgrade: [dependabot] - "
 
@@ -19,7 +22,10 @@ updates:
   - package-ecosystem: "npm"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "weekly"
+      day: "friday"
+      time: "18:00" # UTC
+    open-pull-requests-limit: 20
     commit-message:
       prefix: "Upgrade: [dependabot] - "
     versioning-strategy: increase
@@ -30,7 +36,10 @@ updates:
   - package-ecosystem: "pip"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "weekly"
+      day: "friday"
+      time: "18:00" # UTC
+    open-pull-requests-limit: 20
     commit-message:
       prefix: "Upgrade: [dependabot] - "
     versioning-strategy: increase