Fix V Dockerfiles (PlummersSoftwareLLC#777)

Author: rbergen

PrimeV/solution_1/Dockerfile

@@ -1,8 +1,8 @@
-FROM alpine:3.13 AS build
+FROM alpine:3.15 AS build
 
-ENV V_VER="weekly.2021.45"
+ENV V_VER="weekly.2021.48"
 
-RUN apk update && apk add --no-cache build-base=0.5-r2 bash=5.1.0-r0 git=2.30.2-r0
+RUN apk update && apk add --no-cache build-base bash git
 
 WORKDIR /opt/vlang
 RUN git clone https://github.com/vlang/v /opt/vlang && git checkout "${V_VER}" && make
@@ -14,7 +14,7 @@ COPY *.v .
 
 RUN v -prod primes.v
 
-FROM alpine:3.13
+FROM alpine:3.15
 
 COPY --from=build /opt/app/primes /usr/local/bin/primes
 

PrimeV/solution_2/Dockerfile

@@ -1,8 +1,8 @@
-FROM alpine:3.13 AS build
+FROM alpine:3.15 AS build
 
-ENV V_VER="weekly.2021.45"
+ENV V_VER="weekly.2021.48"
 
-RUN apk update && apk add --no-cache build-base bash=5.1.0-r0 git
+RUN apk update && apk add --no-cache build-base bash git
 
 WORKDIR /opt/vlang
 RUN git clone https://github.com/vlang/v /opt/vlang && git checkout "${V_VER}" && make
@@ -14,7 +14,7 @@ COPY *.v .
 
 RUN v -prod primes.v
 
-FROM alpine:3.13
+FROM alpine:3.15
 
 COPY --from=build /opt/app/primes /usr/local/bin/primes