Update Alpine base images to 3.13

docker/Dockerfile.j2

@@ -5,11 +5,11 @@
 {% if "alpine" in target_file %}
 {%   if "amd64" in target_file %}
 {%     set build_stage_base_image = "clux/muslrust:nightly-2021-01-25" %}
-{%     set runtime_stage_base_image = "alpine:3.12" %}
+{%     set runtime_stage_base_image = "alpine:3.13" %}
 {%     set package_arch_target = "x86_64-unknown-linux-musl" %}
 {%   elif "armv7" in target_file %}
 {%     set build_stage_base_image = "messense/rust-musl-cross:armv7-musleabihf" %}
-{%     set runtime_stage_base_image = "balenalib/armv7hf-alpine:3.12" %}
+{%     set runtime_stage_base_image = "balenalib/armv7hf-alpine:3.13" %}
 {%     set package_arch_target = "armv7-unknown-linux-musleabihf" %}
 {%   endif %}
 {% elif "amd64" in target_file %}

docker/amd64/Dockerfile.alpine

@@ -70,7 +70,7 @@ RUN cargo build --features ${DB} --release --target=x86_64-unknown-linux-musl
 ######################## RUNTIME IMAGE  ########################
 # Create a new stage with a minimal image
 # because we already have a binary built
-FROM alpine:3.12
+FROM alpine:3.13
 
 ENV ROCKET_ENV "staging"
 ENV ROCKET_PORT=80

docker/armv7/Dockerfile.alpine

@@ -71,7 +71,7 @@ RUN musl-strip target/armv7-unknown-linux-musleabihf/release/bitwarden_rs
 ######################## RUNTIME IMAGE  ########################
 # Create a new stage with a minimal image
 # because we already have a binary built
-FROM balenalib/armv7hf-alpine:3.12
+FROM balenalib/armv7hf-alpine:3.13
 
 ENV ROCKET_ENV "staging"
 ENV ROCKET_PORT=80