fix(release): fix broken release due to wrong rust version and resolv…

…er conflit, remove the dockerfile caching as it is not used anyway.

Dockerfile

@@ -29,17 +29,13 @@ COPY . .
 ENV CARGO_TARGET_DIR=/tmp/target
 ENV RUSTC_FLAGS='-C target-cpu=x86-64'
 ENV PORTABLE=ON
-RUN --mount=type=cache,target=/tmp/target \
-    --mount=type=cache,target=/usr/local/cargo/git \
-    --mount=type=cache,target=/usr/local/cargo/registry \
-    cargo +"$(cat /tmp/rust-toolchain)" build -p neard --release && \
+RUN cargo +"$(cat /tmp/rust-toolchain)" build -p neard --release && \
     mkdir /tmp/build && \
     cd /tmp/target/release && \
     mv ./neard /tmp/build
 
 COPY scripts/run_docker.sh /tmp/build/run.sh
 
-
 # Actual image
 FROM ubuntu:18.04
 

Dockerfile.nightly

@@ -29,10 +29,7 @@ COPY . .
 ENV CARGO_TARGET_DIR=/tmp/target
 ENV RUSTC_FLAGS='-C target-cpu=x86-64'
 ENV PORTABLE=ON
-RUN --mount=type=cache,target=/tmp/target \
-    --mount=type=cache,target=/usr/local/cargo/git \
-    --mount=type=cache,target=/usr/local/cargo/registry \
-    cargo +"$(cat /tmp/rust-toolchain)" build -p neard --release --features nightly_protocol --features nightly_protocol_features && \
+RUN cargo +"$(cat /tmp/rust-toolchain)" build -p neard --release --features nightly_protocol --features nightly_protocol_features && \
     mkdir /tmp/build && \
     cd /tmp/target/release && \
     mv ./neard /tmp/build

Makefile

@@ -4,7 +4,7 @@ docker-nearcore:
 docker-nearcore-nightly:
 	DOCKER_BUILDKIT=1 docker build -t nearcore-nightly -f Dockerfile.nightly .
 
-RUST_OPTIONS:=+stable
+RUST_OPTIONS:=$(cat rust-toolchain)
 
 export RUSTFLAGS = -D warnings