Dockerfiles are built with _tagged_ commits

If the commit is tagged, then the release is solid, and we can build our
Dockerfiles.

Previously the Dockerfiles were built with every change. Now that I'm
making Dockerfiles first-class citizens ("Official Docker Images"), we
need discipline when building them.

[#21]

ci/pipeline-sslip.io.yml

@@ -36,7 +36,7 @@ jobs:
       DOMAIN: sslip.io
 - name: build-and-push-sslip.io-dns-server
   plan:
-  - get: sslip.io-src
+  - get: sslip.io-release
     trigger: true
   - task: build-task-image
     privileged: true
@@ -45,14 +45,14 @@ jobs:
       image_resource:
         type: registry-image
         source:
-          repository: vito/oci-build-task
+          repository: concourse/oci-build-task
       inputs:
-      - name: sslip.io-src
+      - name: sslip.io-release
       outputs:
       - name: image
       params:
-        CONTEXT: sslip.io-src/k8s/
-        DOCKERFILE: sslip.io-src/k8s/Dockerfile-sslip.io-dns-server
+        CONTEXT: sslip.io-release/k8s/
+        DOCKERFILE: sslip.io-release/k8s/Dockerfile-sslip.io-dns-server
       run:
         path: build
   - put: sslip.io-dns-server
@@ -60,7 +60,7 @@ jobs:
       image: image/image.tar
 - name: build-and-push-k-v.io-nginx
   plan:
-  - get: k-v.io-html
+  - get: sslip.io-release
     trigger: true
   - task: build-task-image
     privileged: true
@@ -69,14 +69,14 @@ jobs:
       image_resource:
         type: registry-image
         source:
-          repository: vito/oci-build-task
+          repository: concourse/oci-build-task
       inputs:
-      - name: k-v.io-html
+      - name: sslip.io-release
       outputs:
       - name: image
       params:
-        CONTEXT: k-v.io-html/k8s/
-        DOCKERFILE: k-v.io-html/k8s/Dockerfile-k-v.io-nginx
+        CONTEXT: sslip.io-release/k8s/
+        DOCKERFILE: sslip.io-release/k8s/Dockerfile-k-v.io-nginx
       run:
         path: build
   - put: k-v.io-nginx
@@ -84,7 +84,7 @@ jobs:
       image: image/image.tar
 - name: build-and-push-sslip.io-nginx
   plan:
-  - get: sslip.io-html
+  - get: sslip.io-release
     trigger: true
   - task: build-task-image
     privileged: true
@@ -93,14 +93,14 @@ jobs:
       image_resource:
         type: registry-image
         source:
-          repository: vito/oci-build-task
+          repository: concourse/oci-build-task
       inputs:
-      - name: sslip.io-html
+      - name: sslip.io-release
       outputs:
       - name: image
       params:
-        CONTEXT: sslip.io-html/k8s/
-        DOCKERFILE: sslip.io-html/k8s/Dockerfile-sslip.io-nginx
+        CONTEXT: sslip.io-release/k8s/
+        DOCKERFILE: sslip.io-release/k8s/Dockerfile-sslip.io-nginx
       run:
         path: build
   - put: sslip.io-nginx
@@ -112,7 +112,7 @@ resources:
   type: git
   icon: github
   source:
-    uri: https://github.com/cunnie/sslip.io
+    uri: https://github.com/cunnie/sslip.io.git
 
 - name: every-six-hours
   type: time
@@ -120,31 +120,12 @@ resources:
   source: {interval: 6h}
 
 # The repo with our sslip.io executable
-- name: sslip.io-src
+- name: sslip.io-release
   type: git
   icon: github
   source:
     uri: https://github.com/cunnie/sslip.io.git
-    paths:
-    - src
-
-# The repo with our k-v.io nginx/HTML Dockerfile
-- name: k-v.io-html
-  type: git
-  icon: github
-  source:
-    uri: https://github.com/cunnie/sslip.io.git
-    paths:
-    - k8s/document_root_k-v.io
-
-# The repo with our sslip.io nginx/HTML Dockerfile
-- name: sslip.io-html
-  type: git
-  icon: github
-  source:
-    uri: https://github.com/cunnie/sslip.io.git
-    paths:
-    - k8s/document_root_sslip.io
+    tag_filter: "*" # _any_ tag will do, but only tags will do
 
 # Where we will push the k-v.io nginx Docker image with HTML assets
 - name: k-v.io-nginx