Add PHP Dependencies

Adds PHP dependencies to bring the Unit Test images more inline with the extensions present on our LAMP stack.

$BUILD_DEPS unfortunately cannot be removed as the PHP extensions are dynamically not statically linked and need the libraries at runtime.

> ldd /usr/local/lib/php/extensions/no-debug-non-zts-20200930/bz2.so
        /lib/ld-musl-x86_64.so.1 (0x7febab0d1000)
        libbz2.so.1 => /usr/lib/libbz2.so.1 (0x7febab0ba000) <== This is part of bzip2-dev
        libc.musl-x86_64.so.1 => /lib/ld-musl-x86_64.so.1 (0x7febab0d1000)

This mostly resolves #17 (closed). There may be some apps that need special extensions, and we may eventually need to re-visit this, but this should resolve all current issues.

php-unit-test/7.3/Dockerfile

@@ -12,9 +12,11 @@ LABEL org.label-schema.build-date=$BUILD_DATE \
       org.label-schema.schema-version="1.0" \
       maintainer="Alan Nelson <alan.nelson@nebraska.edu>"
 
-RUN apk add --no-cache bash nodejs nodejs-npm $PHPIZE_DEPS \
+RUN export BUILD_DEPS="bzip2-dev icu-dev libpng-dev libzip-dev openldap-dev" \
+    && apk add --no-cache bash nodejs nodejs-npm $PHPIZE_DEPS $BUILD_DEPS \
     && pecl channel-update pecl.php.net \
     && pecl install xdebug redis \
+    && docker-php-ext-install bz2 gd intl ldap mysqli pdo_mysql zip \
     && docker-php-ext-enable xdebug redis \
     && apk del --no-cache $PHPIZE_DEPS
 RUN curl -o /usr/local/bin/composer https://getcomposer.org/composer.phar \