foreman: add page (#1526)

pages/linux/foreman.md

@@ -0,0 +1,27 @@
+# foreman
+
+> Manage Procfile-based applications.
+
+- Start an application with the Procfile in the current directory:
+
+`foreman start`
+
+- Start an application with a specified Procfile:
+
+`foreman start -f {{Procfile}}`
+
+- Start a specific application:
+
+`foreman start {{process}}`
+
+- Validate Procfile format:
+
+`foreman check`
+
+- Run one-off commands with the process's environment:
+
+`foreman run {{command}}`
+
+- Start all processes except the one named worker:
+
+`foreman start -m all=1,worker=0`