Set locale

config/config.yml

+##
+# Basic
+#
+site_title: Tétras Libre                    # The title of your website
+base_url: ~                         # Pico will try to guess its base URL, if this fails, override it here;
+                                    #     Example: https://example.com/pico/
+rewrite_url: ~                      # A boolean (true or false) indicating whether URL rewriting is forced
+debug: ~                            # Set this to true to enable Pico's debug mode
+timezone: ~                         # Your PHP installation might require you to manually specify a timezone
+locale: fr_FR.utf8                           # Your PHP installation might require you to manually specify a locale to use
+
+##
+# Theme
+#
+theme: tetras                      # The name of your custom theme
+themes_url: ~                       # Pico will try to guess the URL to the themes dir of your installation;
+                                    #     If this fails, override it here. Example: https://example.com/pico/themes/
+theme_config:                       # Additional theme-specific config
+    widescreen: ~               # Default theme: Use more horizontal space (i.e. make the site container wider)
+twig_config:                        # Twig template engine config
+    autoescape: html                # Let Twig escape variables by default
+    strict_variables: false         # If set to true, Twig will bail out when unset variables are being used
+    charset: utf-8                  # The charset used by Twig templates
+    debug: ~                        # Enable Twig's debug mode
+    cache: false                    # Enable Twig template caching by specifying a path to a writable directory
+    auto_reload: ~                  # Recompile Twig templates whenever the source code changes
+
+##
+# Content
+#
+date_format: %c                  # Pico's default date format;
+                                    #     See https://php.net/manual/en/function.strftime.php for more info
+pages_order_by_meta: Order         # Sort pages by meta value "author" (set "pages_order_by" to "meta")
+pages_order_by: meta               # Change how Pico sorts pages ("alpha" for alphabetical order, "date", or "meta")
+pages_order: asc                    # Sort pages in ascending ("asc") or descending ("desc") order
+content_dir: ~                      # The path to Pico's content directory
+content_ext: .md                    # The file extension of your Markdown files
+content_config:                     # Parsedown Markdown parser config
+    extra: true                     # Use the Parsedown Extra parser to support extended markup;
+                                    #     See https://michelf.ca/projects/php-markdown/extra/ for more info
+    breaks: false                   # A boolean indicating whether breaks in the markup should be reflected in the
+                                    #     parsed contents of the page
+    escape: false                   # Escape HTML markup in your content files; don't confuse this with some sort of
+                                    #     safe mode, enabling this doesn't allow you to process untrusted user input!
+    auto_urls: true                 # Automatically link URLs found in your markup
+assets_dir: assets/                 # The path to Pico's assets directory
+assets_url: ~                       # Pico will try to guess the URL to the assets dir of your installation;
+                                    #     If this fails, override it here. Example: https://example.com/pico/assets/
+
+##
+# Plugins
+#
+plugins_url: ~                      # Pico will try to guess the URL to the plugins dir of your installation;
+                                    #     If this fails, override it here. Example: https://example.com/pico/plugins/
+DummyPlugin.enabled: false          # Force the plugin "DummyPlugin" to be disabled
+
+##
+# Custom
+#
+my_custom_setting: Hello World!     # You can access custom settings in themes using {{ config.my_custom_setting }}

docker/Dockerfile

@@ -5,10 +5,13 @@ RUN composer create-project --no-interaction picocms/pico-composer pico
 FROM php:7.4-apache
 
 RUN apt-get update && \
-    apt-get install -y libonig-dev libxml2-dev && \
+    apt-get install -y libonig-dev libxml2-dev locales && \
     docker-php-ext-install -j$(nproc) dom mbstring && \
     docker-php-ext-enable dom mbstring
 
+RUN sed -i -e 's/# fr_FR.UTF-8/fr_FR.UTF-8/' /etc/locale.gen && \ 
+    locale-gen
+
 RUN rm -rf /var/www/html
 
 COPY --from=builder /app/pico /var/www/html