surge: add page (#1672)

pages/common/surge.md

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+# surge
+
+> Simple command line web publishing.
+
+- Upload a new site to surge.sh:
+
+`surge {{path/to/my_project}}`
+
+- Deploy site to custom domain (note that the DNS records must point to the surge.sh subdomain):
+
+`surge {{path/to/my_project}} {{my_custom_domain.com}}`
+
+- List your surge projects:
+
+`surge list`
+
+- Remove a project:
+
+`surge teardown {{my_custom_domain.com}}`