Grammar

Use title case for headers, titles, and link titles. Use sentence case for items in bulleted and numbered lists. For companies, organizations, software, and similar things, use the capitalization of the project.
Use exclamation marks very sparingly.
Use hyphenated compound modifiers, unless the adjectival phrase includes -ly. The file has DigitalOcean-specific syntax. The automatically provisioned server includes an active firewall. Use suspended hyphens.
Spell out numbers less than 10 and numbers that begin sentences. Forty thousand developers. Two Droplets. Use numerals if a number is paired with a unit of bits/bytes, for currency, and in ranges.
Periods Use a single space to separate sentences. If the items in a bulleted or numbered list are sentences themselves or are a continuation of the sentence that introduced the list, then use a period at the end of item.