Added CI resources

Dockerfile

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+FROM golang:1.19-alpine
+
+WORKDIR /app
+
+COPY [ "go.mod", "go.sum", "./" ]
+
+RUN go mod download
+
+COPY "datasources" "./datasources/"
+COPY "utils" "./utils/"
+COPY *.go ./
+
+RUN go build -o /golifehkbot
+
+CMD [ "/golifehkbot" ]

concourse/build.yaml

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+platform: linux
+
+image_resource:
+  type: registry-image
+  source:
+    repository: concourse/oci-build-task
+
+inputs:
+  - name: project-src
+    path: .
+
+outputs:
+  - name: image
+
+caches:
+  - path: cache
+
+params:
+  CONTEXT: .
+  # Reference: https://concourse-ci.org/building-an-image-and-using-it-in-a-task.html#build-the-image
+  UNPACK_ROOTFS: true
+
+run:
+  path: build

concourse/prepare-deployment-resources.yaml

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+platform: linux
+
+image_resource:
+  type: registry-image
+  source:
+    repository: alpine
+
+inputs:
+  - name: project-src
+    path: .
+
+outputs:
+  - name: deploy-confs
+
+run:
+  path: sh
+  args:
+    - -exc
+    - |
+      VERSION=$( cat commit.sha )
+      sed "s/IMAGE_TAG/$VERSION/g" k8s/deployments.yaml >> deploy-confs/prod.yaml

k8s/deployments.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: golifehk
+spec:
+  selector:
+    matchLabels:
+      app: golifehk
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: golifehk
+        srv: go
+    spec:
+      imagePullSecrets:
+        - name: registry-auth
+      containers:
+        - name: app
+          image: registry.k8s.astropenguin.net/golifehk:IMAGE_TAG
+          env:
+            - name: TELEGRAM_API_TOKEN
+              valueFrom:
+                secretKeyRef:
+                  name: golifehk-conf
+                  key: TELEGRAM_API_TOKEN