Added Chronos to schedule tasks, restructured config as common pkg, updated server pkg

Dockerfile.builder

@@ -4,11 +4,13 @@ FROM golang:alpine
 ARG BIN_OUTPUT=/go/bin
 ARG GO_SERVER=cmd/server/main.go
 ARG GO_MIGRATE=cmd/migrate/main.go
+ARG GO_CHRONOS=cmd/chronos/main.go
 
 WORKDIR /go/src/app
-COPY src ./
+COPY src/ ./
 
 RUN export CGO_ENABLED=0 ; export GOOS=linux ; export GOARCH=amd64 && \
     go build -ldflags="-w -s" -o "$BIN_OUTPUT/server" $GO_SERVER && \
-    go build -ldflags="-w -s" -o "$BIN_OUTPUT/migrate" $GO_MIGRATE
+    go build -ldflags="-w -s" -o "$BIN_OUTPUT/migrate" $GO_MIGRATE && \
+    go build -ldflags="-w -s" -o "$BIN_OUTPUT/chronos" $GO_CHRONOS