Adds Dockerfiles for API and Db migration & Update deployment flow

Signed-off-by: Shivam Mukhade <smukhade@redhat.com>

api/Dockerfile

@@ -0,0 +1,18 @@
+FROM golang:1.15-alpine3.12 AS builder
+
+WORKDIR /go/src/github.com/tektoncd/hub/api
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o api-server ./cmd/api/...
+
+FROM alpine:3.12
+
+RUN apk --no-cache add git ca-certificates && addgroup -S hub && adduser -S hub -G hub
+USER hub
+
+WORKDIR /app
+COPY --from=builder /go/src/github.com/tektoncd/hub/api/gen/http/openapi3.yaml /app/gen/http/openapi3.yaml
+COPY --from=builder /go/src/github.com/tektoncd/hub/api/api-server /app/api-server
+EXPOSE 8000
+
+CMD [ "/app/api-server" ]

api/db.Dockerfile

@@ -0,0 +1,17 @@
+FROM golang:1.15-alpine3.12 AS builder
+
+WORKDIR /go/src/github.com/tektoncd/hub/api
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o db-migration ./cmd/db/...
+
+FROM alpine:3.12
+
+RUN apk --no-cache add ca-certificates && addgroup -S hub && adduser -S hub -G hub
+USER hub
+
+WORKDIR /app
+COPY --from=builder /go/src/github.com/tektoncd/hub/api/db-migration /app/db-migration
+EXPOSE 8000
+
+CMD [ "/app/db-migration" ]

api/config/20-db-migration.yaml → config/01-db/10-db-migration.yaml

@@ -24,7 +24,7 @@ spec:
     spec:
       containers:
         - name: db-migration
-          image: ko://github.com/tektoncd/hub/api/cmd/db
+          image: quay.io/tekton-hub/db-migration
           env:
             - name: POSTGRES_HOST
               value: db

api/config/31-api-deployment.yaml → config/02-api/22-api-deployment.yaml

@@ -31,7 +31,7 @@ spec:
     spec:
       containers:
         - name: api
-          image: ko://github.com/tektoncd/hub/api/cmd/api
+          image: quay.io/tekton-hub/api
           ports:
             - containerPort: 8000
           readinessProbe: