Update nimble in the builder

Signed-off-by: baalajimaestro <me@baalajimaestro.me>

Dockerfile

@@ -13,8 +13,10 @@ RUN apk update && apk add git \
 COPY . /app
 WORKDIR /app
 
+RUN nimble install nimble --accept
+
 # Build with necessary params to enable statically linking openssl, glibc and sqlite3
-RUN nimble build --passL:-L/usr/lib \
+RUN /root/.nimble/bin/nimble build --passL:-L/usr/lib \
                             -d:ssl \
                             -p:. \
                             --dynlibOverride:ssl \