[web] Explicitly do git lfs install and pull on Netlify.

netlify.toml

@@ -2,6 +2,8 @@
   base    = "web"
   publish = "web/public"
   command = """
+    git lfs install
+    git lfs pull
     yarn --ignore-engines --ignore-optional --non-interactive
     hugo
     node_modules/.bin/hugo-algolia --toml -s"""
@@ -16,10 +18,14 @@
 
 [context.deploy-preview]
   command = """
+    git lfs install
+    git lfs pull
     yarn --ignore-engines --ignore-optional --non-interactive
     hugo -b $DEPLOY_PRIME_URL"""
 
 [context.branch-deploy]
   command = """
+    git lfs install
+    git lfs pull
     yarn --ignore-engines --ignore-optional --non-interactive
     hugo -b $DEPLOY_PRIME_URL"""