Add doc on how to build

cmd/monitor/Dockerfile

@@ -1,6 +1,6 @@
 
 FROM ubuntu:20.04
-LABEL maintainer="Jorge Niedbalski <[email protected]>"
+LABEL maintainer="Canonical Sustaining Engineering <[email protected]>"
 
 RUN apt update -yyq && apt -yyq install ca-certificates git xz-utils python3 python3-yaml coreutils bsdmainutils jq bc python3-simplejson
 RUN update-ca-certificates

cmd/processor/Dockerfile

@@ -1,5 +1,5 @@
 FROM ubuntu:20.04
-LABEL maintainer="Jorge Niedbalski <[email protected]>"
+LABEL maintainer="Canonical Sustaining Engineering <[email protected]>"
 
 RUN apt update -yyq && apt -yyq install ca-certificates git xz-utils python3 python3-yaml coreutils bsdmainutils jq bc python3-simplejson
 RUN update-ca-certificates

doc/howto_build.md

@@ -0,0 +1,106 @@
+# Setup
+```
+sudo apt install golang make
+sudo snap install docker
+```
+
+## Build Athena
+
+```
+$ make common-build
+>> building binaries
+GO111MODULE=on /home/ubuntu/go/bin/promu build --prefix /home/ubuntu/git/canonical/athena-core 
+ >   athena-processor
+ >   athena-monitor
+$ mv athena-monitor cmd/monitor/
+$ mv athena-processor cmd/processor/
+```
+
+## Build Images
+
+Get docker network info and ensure that your firewall allows it:
+
+```
+# docker network ls
+NETWORK ID     NAME      DRIVER    SCOPE
+d257092905a7   bridge    bridge    local
+a1e33a499c70   host      host      local
+2c959b426f97   none      null      local
+# docker network inspect d257092905a7
+...
+```
+
+If a build fails, look in dmesg to see if anything got blocked and update firewall if needed.
+
+See cmd/monitor/Dockerfile and cmd/processor/Dockerfile for image config.
+
+Build monitor:
+
+```
+# docker build cmd/monitor/
+Sending build context to Docker daemon   17.3MB
+Step 1/6 : FROM ubuntu:20.04
+20.04: Pulling from library/ubuntu
+846c0b181fff: Downloading [=======================>                           ]  13.25MB/28.58MB846c0b181fff: Pull complete 
+Digest: sha256:0e0402cd13f68137edb0266e1d2c682f217814420f2d43d300ed8f65479b14fb
+Status: Downloaded newer image for ubuntu:20.04
+ ---> d5447fc01ae6
+Step 2/6 : LABEL maintainer="Canonical Sustaining Engineering <[email protected]>"
+ ---> Running in fd6940b8b5d0
+Removing intermediate container fd6940b8b5d0
+ ---> 55d857651b9d
+Step 3/6 : RUN apt update -yyq && apt -yyq install ca-certificates git xz-utils python3 python3-yaml coreutils bsdmainutils jq bc python3-simplejson
+ ---> Running in e02cbee5e4f6
+...
+Successfully built 32ca0a3b8176
+```
+
+Build processor:
+
+```
+# docker build cmd/processor/
+Sending build context to Docker daemon   17.9MB
+Step 1/6 : FROM ubuntu:20.04
+ ---> d5447fc01ae6
+Step 2/6 : LABEL maintainer="Canonical Sustaining Engineering <[email protected]>"
+ ---> Using cache
+ ---> 55d857651b9d
+Step 3/6 : RUN apt update -yyq && apt -yyq install ca-certificates git xz-utils python3 python3-yaml coreutils bsdmainutils jq bc python3-simplejson
+ ---> Using cache
+ ---> 8014d38bde4e
+Step 4/6 : RUN update-ca-certificates
+ ---> Using cache
+ ---> 2718ebbbbb87
+Step 5/6 : RUN mkdir /etc/athena/
+ ---> Using cache
+ ---> 135bf991e1b1
+Step 6/6 : COPY ./athena-processor /athena-processor
+ ---> d44deeb0cfb9
+Successfully built d44deeb0cfb9
+```
+
+Tag/name images:
+
+```
+# docker image ls
+REPOSITORY   TAG       IMAGE ID       CREATED              SIZE
+<none>       <none>    96d6e2650a4e   30 seconds ago       268MB
+<none>       <none>    7508809b8547   About a minute ago   267MB
+ubuntu       20.04     d5447fc01ae6   4 weeks ago          72.8MB
+# docker image tag 32ca0a3b8176 athena-monitor:latest
+# docker image tag d44deeb0cfb9 athena-processor:latest
+```
+
+The following should return nothing if all build successfully:
+
+```
+# docker ps -a
+CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES
+```
+
+# Test Build
+
+```
+make devel
+```
+