Added gruvbox-dark and gruvbox-light themes (#490)

README.md

@@ -188,7 +188,7 @@ Assign a default value for each setting by passing environment variables to Libr
 
 | Name                    | Possible values                                                                                     | Default value |
 |-------------------------|-----------------------------------------------------------------------------------------------------|---------------|
-| `THEME`                 | `["system", "light", "dark", "black", "dracula", "nord", "laserwave", "violet", "gold", "rosebox"]` | `system`      |
+| `THEME`                 | `["system", "light", "dark", "black", "dracula", "nord", "laserwave", "violet", "gold", "rosebox", "gruvboxdark", "gruvboxlight"]` | `system`      |
 | `FRONT_PAGE`            | `["default", "popular", "all"]`                                                                     | `default`     |
 | `LAYOUT`                | `["card", "clean", "compact"]`                                                                      | `card`        |
 | `WIDE`                  | `["on", "off"]`                                                                                     | `off`         |

static/themes/gruvboxdark.css

@@ -0,0 +1,13 @@
+/* Gruvbox-Dark theme setting */
+.gruvboxdark {
+	--accent: #8ec07c;
+	--green: #b8bb26;
+	--text: #ebdbb2;
+	--foreground: #3c3836;
+	--background: #282828;
+	--outside: #3c3836;
+	--post: #3c3836;
+	--panel-border: 1px solid #504945;
+	--highlighted: #282828;
+	--shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
+}

static/themes/gruvboxlight.css

@@ -0,0 +1,13 @@
+/* Gruvbox-Light theme setting */
+.gruvboxlight {
+	--accent: #427b58;
+	--green: #79740e;
+	--text: #3c3836;
+	--foreground: #ebdbb2;
+	--background: #fbf1c7;
+	--outside: #ebdbb2;
+	--post: #ebdbb2;
+	--panel-border: 1px solid #d5c4a1;
+	--highlighted: #fbf1c7;
+	--shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
+}