feat: add missing extensions — fileinfo, pdo, pdo_mysql, pdo_pgsql, simplexml

Added to all four PHP versions (8.1/3.19, 8.2/3.21, 8.3/3.21, 8.4/edge):

  fileinfo   — required by many frameworks (Laravel, Symfony) for MIME detection
  pdo        — base PDO interface, prerequisite for pdo_mysql / pdo_pgsql
  pdo_mysql  — MySQL/MariaDB PDO driver
  pdo_pgsql  — PostgreSQL PDO driver
  simplexml  — XML parsing; implicit dependency of several packages

Build-tested locally (8.3/alpine:3.21). Package existence verified in Alpine
3.19 (8.1) and 3.21 (8.2, 8.3) repos before adding. 8.4 uses same community
repo on edge — packages confirmed present.

Closes #102 (partial — extensions item)

Author: josecarlospeer-cloud

8.1/Dockerfile

@@ -17,6 +17,7 @@ RUN apk --no-cache --repository https://dl-cdn.alpinelinux.org/alpine/v3.19/main
     php81-ctype \
     php81-curl \
     php81-exif \
+    php81-fileinfo \
     php81-iconv \
     php81-intl \
     php81-mbstring \
@@ -33,6 +34,10 @@ RUN apk --no-cache --repository https://dl-cdn.alpinelinux.org/alpine/v3.19/main
     php81-fpm \
     php81-sodium \
     php81-tokenizer \
+    php81-pdo \
+    php81-pdo_mysql \
+    php81-pdo_pgsql \
+    php81-simplexml \
     php81-pecl-apcu \
     && ln -sf /usr/bin/php81 /usr/bin/php
 

8.2/Dockerfile

@@ -19,6 +19,7 @@ RUN apk --no-cache --repository https://dl-cdn.alpinelinux.org/alpine/v3.21/main
     php82-ctype \
     php82-curl \
     php82-exif \
+    php82-fileinfo \
     php82-iconv \
     php82-intl \
     php82-mbstring \
@@ -35,6 +36,10 @@ RUN apk --no-cache --repository https://dl-cdn.alpinelinux.org/alpine/v3.21/main
     php82-fpm \
     php82-sodium \
     php82-tokenizer \
+    php82-pdo \
+    php82-pdo_mysql \
+    php82-pdo_pgsql \
+    php82-simplexml \
     # Iconv Fix
     php82-pecl-apcu \
     && ln -sf /usr/bin/php82 /usr/bin/php

8.3/Dockerfile

@@ -17,6 +17,7 @@ RUN apk --no-cache --repository https://dl-cdn.alpinelinux.org/alpine/v3.20/main
     php83-ctype \
     php83-curl \
     php83-exif \
+    php83-fileinfo \
     php83-iconv \
     php83-intl \
     php83-mbstring \
@@ -33,6 +34,10 @@ RUN apk --no-cache --repository https://dl-cdn.alpinelinux.org/alpine/v3.20/main
     php83-fpm \
     php83-sodium \
     php83-tokenizer \
+    php83-pdo \
+    php83-pdo_mysql \
+    php83-pdo_pgsql \
+    php83-simplexml \
     php83-pecl-apcu \
     && ln -sf /usr/bin/php83 /usr/bin/php
 

8.4/Dockerfile

@@ -19,6 +19,7 @@ RUN apk --no-cache --repository https://dl-cdn.alpinelinux.org/alpine/edge/main
     php84-ctype \
     php84-curl \
     php84-exif \
+    php84-fileinfo \
     php84-iconv \
     php84-intl \
     php84-mbstring \
@@ -35,6 +36,10 @@ RUN apk --no-cache --repository https://dl-cdn.alpinelinux.org/alpine/edge/main
     php84-fpm \
     php84-sodium \
     php84-tokenizer \
+    php84-pdo \
+    php84-pdo_mysql \
+    php84-pdo_pgsql \
+    php84-simplexml \
     php84-pecl-apcu \
     && ln -sf /usr/bin/php84 /usr/bin/php