Refactor Dockerfile and update README for key management (#1743)

Author: sergeytimoshin

prover/server/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20.3-alpine as builder
+FROM golang:1.20.3-alpine AS builder
 
 WORKDIR /app
 
@@ -10,10 +10,12 @@ COPY . .
 ENV CGO_ENABLED=0
 RUN go build -v -o /usr/local/bin/light-prover .
 
+RUN mkdir -p /tmp/empty_proving_keys
+
 FROM gcr.io/distroless/base-debian11:nonroot
 
 COPY --from=builder /usr/local/bin/light-prover /usr/local/bin/light-prover
-COPY --from=builder /app/proving-keys/ /proving-keys/
+COPY --chown=nonroot:nonroot --from=builder /tmp/empty_proving_keys /proving-keys/
 
 ENTRYPOINT [ "light-prover" ]
 CMD [ "start", "--inclusion", "--non-inclusion", "--keys-dir", "/proving-keys/" ]

prover/server/README.md

@@ -105,11 +105,13 @@ To run specific tests cd into respective folder (merkle-tree/prover) and `go tes
 ```shell
 docker build -t light-prover .
 
-# /host/path/to/keys should contain the config file
-docker run -it \
-    --mount type=bind,source=host/path/to/config,target=/config \
-    -p 3001:3001 \
-    light-prover
+docker run -d \
+  -v /path/to/proving-keys:/proving-keys/:ro \
+  -p 3001:3001 \
+  light-prover:latest \
+  start \
+  --run-mode forester-test \
+  --keys-dir /proving-keys/
 ```
 
 Or in docker compose
@@ -119,7 +121,7 @@ light-prover:
   # Path to the repo root directory
   build: ./light-prover
   volumes:
-    - /host/path/to/config:/config
+    - /host/path/to/proving-keys:/proving-keys
   ports:
     # Server
     - "3001:3001"