Symlink OpenSSL to LibreSSL in Alpine image

The commands used are identical for both the OpenSSL and LibreSSL,
so let's create a symlink to LibreSSL in order to reduce the
complexity of out scripts.

Author: JonasAlfredsson

src/Dockerfile-alpine

@@ -41,6 +41,9 @@ RUN set -ex && \
     mkdir -p /etc/nginx/user_conf.d && \
     chown 82:82 -R /var/www \
     && \
+# Symlink libressl so it is invoked when "openssl" is called by the scripts.
+    ln -s /usr/bin/libressl /usr/bin/openssl \
+    && \
 # Make sure there are no surprise config files inside the config folder.
     rm -f /etc/nginx/conf.d/*
 

src/scripts/create_dhparams.sh

@@ -34,13 +34,7 @@ create_dhparam() {
     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     "
     info "Will now output to the following file: '${1}'"
-    if command -v libressl >/dev/null 2>&1; then
-        debug "Using libressl for creating the dhparams"
-        libressl dhparam -out "${1}" "${DHPARAM_SIZE}"
-    else
-        debug "Using openssl for creating the dhparams"
-        openssl dhparam -out "${1}" "${DHPARAM_SIZE}"
-    fi
+    openssl dhparam -out "${1}" "${DHPARAM_SIZE}"
     info "
     %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     % >>>>>   Diffie-Hellman parameter creation done!   <<<<< %