create gitea tofu bot user

.gitea/workflows/iac.yaml

@@ -0,0 +1,61 @@
+---
+# template source: https://github.com/bretfisher/docker-build-workflow/blob/main/templates/call-docker-build.yaml
+name: Postgres
+
+on: #[push,pull_request]
+  push: &tofuPaths
+    paths:
+      - 'iac/*.tf'
+      - 'iac/*.tfvars'
+      - 'iac/**/*.tf'
+      - 'iac/**/*.tfvars'
+  pull_request: *tofuPaths
+
+# cancel any previously-started, yet still active runs of this workflow on the same branch
+concurrency:
+  group: ${{ github.ref }}-${{ github.workflow }}
+  cancel-in-progress: true
+
+.vault_step: &vault_step
+  name: read vault secret
+  uses: https://gitea.arcodange.duckdns.org/arcodange-org/vault-action.git@main
+  id: vault-secrets
+  with:
+    url: https://vault.arcodange.duckdns.org
+    jwtGiteaOIDC: ${{ needs.gitea_vault_auth.outputs.gitea_vault_jwt }}
+    role: gitea_cicd
+    method: jwt
+    path: gitea_jwt
+    secrets: |
+        kvv1/google/credentials credentials | GOOGLE_BACKEND_CREDENTIALS ;
+        kvv1/admin/gitea token | GITEA_TOKEN
+
+jobs:
+  gitea_vault_auth:
+    name: Auth with gitea for vault
+    runs-on: ubuntu-latest
+    outputs:
+      gitea_vault_jwt: ${{steps.gitea_vault_jwt.outputs.id_token}}
+    steps:
+
+      - name: Auth with gitea for vault
+        id: gitea_vault_jwt
+        run: |
+          echo -n "${{ secrets.vault_oauth__sh_b64 }}" | base64 -d | bash
+
+  tofu:
+    name: Tofu
+    needs:
+      - gitea_vault_auth
+    runs-on: ubuntu-latest
+    env:
+      OPENTOFU_VERSION: 1.8.2
+      TERRAFORM_VAULT_AUTH_JWT: ${{ needs.gitea_vault_auth.outputs.gitea_vault_jwt }}
+    steps:
+      - *vault_step
+      - uses: actions/checkout@v4
+      - name: terraform apply
+        uses: dflook/terraform-apply@v1
+        with:
+          path: iac
+          auto_approve: true