Clean up test suite (#134)

This attempts to simplify tests, and make them generally more usable:
- simplifies CI jobs
- makefile tweaks, init.sh clean up
- small dockerfile, compose, etc. improvements
- removes sdk-tester dockerfile, the sdk repo has it
- removes redundant test scripts, improve run-tests
- simplifies and removes redundant logic in test suite. covers ignored errors
- adds logging context, doc updates

Co-authored-by: Roy Crihfield <roy@manteia.ltd>
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Reviewed-on: cerc-io/laconicd#134
Reviewed-by: Thomas E Lackey <telackey@noreply.git.vdb.to>
Co-authored-by: Prathamesh Musale <prathamesh@noreply.git.vdb.to>
Co-committed-by: Prathamesh Musale <prathamesh@noreply.git.vdb.to>

Dockerfile

@@ -1,14 +1,14 @@
 FROM golang:alpine AS build-env
 
-# Set up dependencies
-ENV PACKAGES git build-base
+# Install dependencies
+RUN apk add --update git build-base linux-headers
 
 # Set working directory for the build
 WORKDIR /go/src/github.com/cerc-io/laconicd
 
-# Install dependencies
-RUN apk add --update $PACKAGES
-RUN apk add linux-headers
+# Cache Go modules
+COPY go.mod go.sum ./
+RUN go mod download
 
 # Add source files
 COPY . .
@@ -21,10 +21,10 @@ FROM alpine:3.17.0
 
 # Install ca-certificates
 RUN apk add --update ca-certificates jq curl
-WORKDIR /
 
 # Copy over binaries from the build-env
 COPY --from=build-env /go/src/github.com/cerc-io/laconicd/build/laconicd /usr/bin/laconicd
 
+WORKDIR /
 # Run laconicd by default
-CMD ["laconicd"]
+ENTRYPOINT ["laconicd"]