Renamed collector, aggregator to api server, api folder to agent (#133)

* Renamed aggregator -> apiServer.

* Format errors with container names.

* Renamed collector -> apiServer.

* Rephrased help messages.

* Moved api -> agent.

* Continue renameing api -> agent in Makefile and Dockerfiles.

debug.Dockerfile

@@ -1,4 +1,4 @@
-# creates image in which mizu api is remotely debuggable using delve
+# creates image in which mizu agent is remotely debuggable using delve
 FROM node:14-slim AS site-build
 
 WORKDIR /app/ui-build
@@ -14,10 +14,10 @@ ENV CGO_ENABLED=1 GOOS=linux GOARCH=amd64
 
 RUN apk add libpcap-dev gcc g++ make
 
-# Move to api working directory (/api-build).
-WORKDIR /app/api-build
+# Move to agent working directory (/agent-build).
+WORKDIR /app/agent-build
 
-COPY api/go.mod api/go.sum ./
+COPY agent/go.mod agent/go.sum ./
 COPY shared/go.mod shared/go.mod ../shared/
 COPY tap/go.mod tap/go.mod ../tap/
 
@@ -25,10 +25,10 @@ RUN go mod download
 # cheap trick to make the build faster (As long as go.mod wasn't changes)
 RUN go list -f '{{.Path}}@{{.Version}}' -m all | sed 1d | grep -e 'go-cache' -e 'sqlite' | xargs go get
 
-# Copy and build api code
+# Copy and build agent code
 COPY shared ../shared
 COPY tap ../tap
-COPY api .
+COPY agent .
 RUN go build -gcflags="all=-N -l" -o mizuagent .
 
 
@@ -38,11 +38,11 @@ RUN apk add bash libpcap-dev tcpdump
 WORKDIR /app
 
 # Copy binary and config files from /build to root folder of scratch container.
-COPY --from=builder ["/app/api-build/mizuagent", "."]
+COPY --from=builder ["/app/agent-build/mizuagent", "."]
 COPY --from=site-build ["/app/ui-build/build", "site"]
 
 # install remote debugging tool
 RUN go get github.com/go-delve/delve/cmd/dlv
 
 ENTRYPOINT "/app/mizuagent"
-#CMD ["sh", "-c", "dlv --headless=true --listen=:2345 --log --api-version=2 --accept-multiclient exec ./mizuagent -- --aggregator"]
+#CMD ["sh", "-c", "dlv --headless=true --listen=:2345 --log --api-version=2 --accept-multiclient exec ./mizuagent -- --api-server"]